Discontinued Operations (Summary Of Discontinued Operations Presented In Consolidated Statements Of Income And Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations [Abstract]
Operating revenues	$ 1,935	$ 4,103	$ 5,234	$ 15,716
Total operating expenses	1,463	2,669	2,603	9,882
Operating income	472	1,434	2,631	5,834
Loss (gain) on sale			134	(5,469)
Other, net		1		2
Income from discontinued operations before income taxes	472	1,433	2,497	11,301
Provision for income taxes	187	565	1,003	4,150
Income from discontinued operations	$ 285	$ 868	$ 1,494	$ 7,151